[R] Adding time series to time graphs

[Simon Kiss]

Hello: I have done this before but cannot figure out how to do it again.

I would like to graph campaign evolution of news stories on certain topics. The 
campaign time period is as follows:

campaign-seq.Date(from=as.Date('2011-09-06'), to=as.Date('2011-10-5'), by=1)

I have a table of newspaper story frequencies containing a certain word that 
can be turned into a data.frame (or not). I'll reproduce it as a data.frame

plotdf-data.frame(story.dates=seq.Date(as.Date('2011-09-17'),as.Date('2011-09-30'),
 by=1), Freq=seq(1,14, by=1))

How do I overlay the frequency of newspaper stories in a line plot on a graph 
where the x-axis is a series of dates twice as long as the time series itself? 
The reason I'd like this is because I'd like to add a couple of other story 
time series as well. They may appear at other points in time in the campaign as 
well.

Thanks.
Simon Kiss
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Re: [R] Adding time series to time graphs

[Nordlund, Dan (DSHS/RDA)]

 -Original Message-
 From: r-help-boun...@r-project.org [mailto:r-help-bounces@r-
 project.org] On Behalf Of Simon Kiss
 Sent: Thursday, April 11, 2013 12:35 PM
 To: r-help@r-project.org
 Subject: [R] Adding time series to time graphs
 
 Hello: I have done this before but cannot figure out how to do it
 again.
 
 I would like to graph campaign evolution of news stories on certain
 topics. The campaign time period is as follows:
 
 campaign-seq.Date(from=as.Date('2011-09-06'), to=as.Date('2011-10-5'),
 by=1)
 
 I have a table of newspaper story frequencies containing a certain word
 that can be turned into a data.frame (or not). I'll reproduce it as a
 data.frame
 
 plotdf-data.frame(story.dates=seq.Date(as.Date('2011-09-
 17'),as.Date('2011-09-30'), by=1), Freq=seq(1,14, by=1))
 
 How do I overlay the frequency of newspaper stories in a line plot on a
 graph where the x-axis is a series of dates twice as long as the time
 series itself? The reason I'd like this is because I'd like to add a
 couple of other story time series as well. They may appear at other
 points in time in the campaign as well.
 
 Thanks.
 Simon Kiss

Maybe use the xlim parameter with plot?

with(plotdf, plot(story.dates,Freq, type='l', xlim=range(campaign)))


Hope this is helpful,

Dan

Daniel J. Nordlund
Washington State Department of Social and Health Services
Planning, Performance, and Accountability
Research and Data Analysis Division
Olympia, WA 98504-5204


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https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.